Toga

A Python-native, OS-agnostic GUI toolkit that leverages native system widgets for a seamless desktop and mobile experience.

Toga serves as the core UI library for the BeeWare Project, enabling developers to build cross-platform applications using a single Python codebase. Unlike frameworks that mimic interface elements, Toga maps Python code directly to native components (such as Cocoa on macOS, GTK+ on Linux, and UIKit on iOS) to ensure high-performance, platform-specific behavior. It integrates tightly with Briefcase for packaging, allowing teams to deploy standalone installers for Windows, Android, and macOS without managing multiple UI logic layers.

https://toga.readthedocs.io